Everton spent big in the close-season, breaking their record transfer three times over the course of the window, but Koeman's side have struggled to gel in recent weeks, having succumbed to two successive Premier League defeats - against Chelsea and Tottenham respectively.

Koeman, though, says Everton's domestic struggles will not distract them from their aims in Europe, adding that he is confident his team will improve following a poor display against Tottenham.

"I take the Europa League really seriously. That will be no different tomorrow," Koeman said.

"Every manager in the past took every game seriously but, maybe, they did more rotation than other clubs in this competition."